Common Source JFET Stage (CB25568E)

We found this circuit in the April 2013 issue of Electronics Now. Any JFET can be used. Note the relatively high supply voltages.

Gain 1000 Sample and Hold (CB5960E)
This 80's circuit has been winning. It is a 1 000 gain sample and hold circuit and an offset...
Instrumentation Amplifier (CB4230E)
The purpose of this 1-transistor amplifier is to allow the use of a milliammeter in an application...
20 kHz ring counter (CB6138E)
We found this circuit in an old General Electric documentation. In fact, PUTs are not common...